Truck for railway vehicles



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TRUCK FOR RAILWAY VEHlCLES.

APPLICATION HLED 050.23, 1921.

PatehtedSept. 12,1922.

2 SHEETSSHEET 1.

WIT/I555.

"TI" ll INVENTOR WM 6 I aw B Y Y WIW I A TTORNEYS W. E. WOODAR'D.

TRUCK FOR RMLWAY VEHICLES.

APPLICATION HLED nEc.2a, 192].

PatentedSept. 12, 1922.

2 SHEETS-SHEET 2.

I 1 VENTOR WM 6 $3M ATTORNEY Patented Sept. 12, 1922.

UNITED STATES PATENT OFFICE.

WILLIAM E. WOODARD, OF FOREST HILLS, NEW YORK, ASSIGNOR T0 FRANKLINRAIL- WAY SUPPLY COMPANY, A CURPORATION OF DELAWARE.

TRUCK FOR RAILWAY VEHICLES.

T 0 all whom it may concern Be it known that 1, WILLIAM E. WOODARD, acitizen of the United States, residing at Forest Hills, in the county ofQueens and State of New York, have invented certain new and usefulImprovements in Trucks for Railway Vehicles, of which the following is aspecification.

This inventionrelates totrucks for railway vehicles and it isparticularly useful in locomotive engine trucks. The invention has to dowith that type of truck known as a lateral motion truck and is animprovement on the invention patented to me April 29, 1913, No.1,060,222. 1

In the construction shown in such patent, centering rockers areinterposed between the bolster and truck frame, the bolster having fourlower surfaces contacting with four rocker surfaces, i. e., the bolsterhas four points of support. Difficulty has been encountered with thisconstruction because of the inability of securing a perfect contact atthe four points of support. This results, among other things, in unevenand twisting stresses on the parts and also in uneven wear, which latteris usually of such character as to increase the inequality andinstabilityof the support. I have furthermore rouna'umt there isadditional wear on the bearing surfaces resulting from the abrasiveaction when the bearing surfaces move on each other. y

The nature of the difiiculties above mentioned will be readilyunderstood on considering the severe vibration" and pounding to whichrolling stock of this character is subject.

One of the primary objects of my invention is to overcome thedifiiculties referred to and to secure certain additional advantageswhich will be hereinafter pointed out more particularly.

I accomplish the foregoing by means of a construction, the preferredembodiments of which I have illustrated in the accompanying drawings,wherein:

Fig. 1 is a plan view of a truck embodying my inprovements'; Fig. 2 is asection taken on the line 2- 2 of Fig. 1; Fig. 3 is a bottom plan viewof the bolster, drawn on an enlarged scale; Fig. 4 is a top plan view ofan improved form of centering rocker forming a part of my invention;Fig. 5 is of Fig. 6; Fig. 6 is a section taken on the line 6-6of Fig. 5;and Fig. 7 is a section taken on the line 7-7 of Fig. 6 but illustrating the parts in another-position.

Referring now to Figs. 1 and 2, particuiarly, it will be seen that thetruck is of usual construction and it will suflicefor the purposes ofthis specification to make reference to the center pin 7 the bolster Ahavinga center plate 8 for the reception of the center pin; and thetransom or bolster support 9, extending between the side frames 10 ofthe truck.

Referring now to Figs. 3 and 5, particularly, it will be seen that thebolster A is constructed so as to have three depending centering rockerbearing portions (Z, 6, f,

with inverted V-shaped bearing surfaces 11.

The bearing portions 65 and e, as will be seen 011 inspection of Fig.3,-are located at opposite edges of the bolster, on one side of thecenter line thereof and in substantial alinement. ranged on the otherside of the center line of the bolster and comes opposite the space 9between the bearingp'ortions dande. The bearing portion 7 isapproximately equal to the combined dimensions of the portions d and 6so that the total bearing surfacespresented are equal in area. Alongtheir inner edges the portions 03 and e are provided with a-plurality ofrecesses or pockets 12, and the portion f has similar pockets at itsends, arranged in alinement with the pockets in the portions 65 and c. Yi

The construction of the centering rockers will: now be described. Theserockers,indijournal portions 14 adapted to take seat in the seats 15 ofbearing strips 16 supported in the centering rocker pocket 'ofthebolster support. The rockers are ribbed longitudinally between channels;as indicated at 17 The third bearing portion f is ar I in Figsfi and 6,and they are transversely "three-point. support is provided for thebolster which, therefore, will; alwayshave a proper, stable support. Itwill also be noted that the construction is such that it is possible touse counterpart rockers, thus avoiding the necessity of making right andlefthand rockers. NVhere it is necessary to re cessthe rocker, asindicated at 20, in order to accommodate the pin 21, it will be seenthat they maybe fitted into place by simply reversing a pair of rockers,end for end.

- It will be seen from. the foregoing that the support afforded by thearrangement described is such as to assure stability and to avoidexcessive wear of uneven character as is noticeable where-the support isunstable. Furthermore, it will be seen that the life of 1 the parts isextended for when wear hasgone to undesirable lengths, fresh bearlngsurfaces will be presented to the parts d, e and f by simplyinterchanging the rockers. The

excessive wear resulting from the abrasive action incidentto the rockersand bolsters shifting relative to one another during lateral motion, isobviatedby'the inter-engaging portions 12 and 13 which tend to produce amore orv less true rolling action, without slipping or relative shiftingof bolster and "rockers.

40 sented by simply reversing the position of the bolster.. Thearrangement is also such Fresh-bearing surfaces may bealso prethatpractically 50% of the length of the rocker is'utilized for bearingsurfaces, affording a material increase over older designs.

What I claim is:

i I 1.- In a lateral'motion railway vehicle truck, a bolster havingthree bearing surfacesifor centering rockers, two of said surfaces beingon one side of the center line -.of the bolster and spaced apart and thethird surface being-on the opposite side and ar ranged opposite thespace between the other surfaces. 29Inv a lateral motion railway vehicletruck, a bolster having three bearing surfaces for centering rockers,arranged so that with twocenterlng rockers, two of the surfaces bear onone rocker and the third surface on theother rocker providing athreepoint support.

In a lateral motion railway vehicle I truck, a bolster having three.bearing surfaces for centering rockers in its lower face in combinationwith two substantially counterpart centering rockers each having threebearing surfaces arranged in a line, the bearing surfaces on the bolsterbeing so arranged that two of them bear onthe end surfaces of one rockerand the third surface bearing on the middle surface of the other rocker.

4;. In a lateral motion railway vehicle truck, a bolster having threebearing surfaces for centering rockers, in its lower face in combinationwith two substantially counterpart centering rockers each having threebearing surfaces arranged in a line, the bearing surfaces on the bolsterbeing so arranged that two of them bear on the end surfaces of onerocker and the third surface bearing on the middle surface of the otherrocker, such third surface and the middle surfaces of the rockers beingof greater length than the other surfaces.

5. In a lateral motion railway vehicle truck, a bolster having its lowerpart so formed as to provide-three centering rocker bearing surfaceslocated below adj acent'portions of the bolster, two of said surfacesbeing arranged substantially in line and spaced apart and the thirdbeing opposite the space between the other two.

6. In a lateral motion railway vehicle truck having a bolster, acentering rocker having three bearing surfaces for the bolster arrangedin substantial .alinement and spaced apart longitudinally.

7. In a lateral motion railway vehicle truck having a bolster, acentering rocker having three bearing surfaces for the bolster arrangedin substantial alinement and spaced apart longitudinally, together withmeans betweenthe surfaces for engaging the bolster to prevent relativeshifting. I 8. In a lateral motion railway vehicle truck a bolster and acentering rocker having bearing surfaces, and mterengaging means onbolster and rocker to prevent relative shifting during rocking, saidmeans consisting of a plurality of projections on the rocker and aplurality of corresponding recesses on the bolster. V p

9. In a lateral motion railway vehicle truck, a bolster having threecentering rocker bearing portions two of which are arrangedsubstantially in, line and spaced apart and provided with. a pluralityof recesses at their inner ends, and the third of which is disposedopposite the space-between the said two and is provided at its ends witha plurality .of recesses substantially alining with said first mentionedre- "cesses, in combination with two substan-.

tially counterpart rockers each having three spaced bearing portionswith a plurality of projections therebetween and 'complemental to saidrecesses. Y

10. In a lateral motion railway vehicle truck, a bolster having threedepending centering rocker bearing portions arranged so that with twocentering rockers, two of said portions bear on one rocker and theremaining portion on the other rocker to provide a three-point support.

11. In a lateral motion railway vehicle truck, the combination of abolster having centering rocker bearing surfaces, and a plurality ofcentering rockers, said surfaces and rockers being so disposed as toprovide a three-point support for the bolster.

12. In a lateral motion railway vehicle truck, a bolster having threecentering rocker bearing surfaces, the area of one of said surfacesbeing substantially equal to the combined areas of the other two.

13. In a lateral motion railway vehicle truck, a centering rocker havingthree bolster supporting surfaces, the area of one of which issubstantially equal to the combined areas of the other two.

14. In a lateral motion railway vehicle truck, a bolster having threecentering rocker bearing surfaces, and two substantially counterpartcentering rockers each having a bolster bearing portion of lengthsubstantially equal to the combined. lengths of the three bolstercentering rocker bearing surfaces.

15. In a lateral motion railway vehicletruck, the combination of abolster and supporting means between the bolster and the truck arrangedto provide a three-point support for the bolster, said supporting meanspermitting lateral motion of the bolster.

16. In a lateral motion railway vehicle truck, the combination of abolster and a rocker, the bolster and rocker having bearing surfaces sodisposed that fresh bearing surface is presented when the bolster androcker are arranged in relatively reversed relation.

In testimony whereof, I have hereunto signed my name.

WILLIAM E. WOODARD.

